The M32 grenade launcher (M32 MGL with Trijicon RX01 red dot sight) is a revolver-style multiple grenade launcher that can be loaded with up to six grenades at once. It is the larger counterpart of the M79 grenade launcher. Their projectiles are equal in power, but the M32 can fire all six grenades in under two seconds, whereas the M79 can only fire one before reloading. Because grenades are reloaded individually, the reload can be interrupted before a full set of grenades have been chambered. Shots should still be carefully considered though, as it takes a comparatively long time to reload and each shot creates a thick smoke cloud on detonation, making it difficult for yourself and/or other players to see approaching enemies.

There is also a "Camo M32" available from the "Camo Weapons DLC". Its statistics are identical to the normal M32.

The M32 has a base price of £4000 which decreases according to the table shown.
It has a drum magazine with 6 grenades and 30 additional grenades can be carried, for a total of 36 shots. At £7-10 per grenade a full load of ammo costs quite some money, especially if taken into account that the Demolition should also buy a few Pipe bombs.
So it is of advantage for the team to let the Demolition pick up any found ammo boxes.

Due to the large splash damage caused by the explosions and self-damage, the M32 is hazardous to the player at short to medium range. Due to a safety feature of the grenades, however, it can be fired at point-blank range, killing weaker foes by sheer force of the grenade. Regardless, it is less practical than hitting groups at longer ranges, and against stronger specimens, the blunt impact is less than ideal, but may be necessary. As with any explosive, anyone or anything that takes damage but lives through the explosion will burn with a small fire for a few seconds. This deals no damage, but can be useful for tracking invisible specimens, such as the Patriarch and Stalkers, without relying on a Commando.

Reserve ammunition for large groups or stronger specimens. When firing at long range, remember to compensate for the arc of the grenade's trajectory. If enemies are too close, aim for a wall, ceiling or floor behind them. This will put them in the splash damage and keep you out, and prevent you from wasting the shell with an impact that does not detonate it. For most situations, it can be beneficial to carry a another weapon, such as a MK23 or Lever-action rifle, so that you have an effective short range weapon, for close encounters and tight corners. Providing you have enough team-mates to provide you adequate cover, the M79 can also be carried to provide a backup supply of projectile grenades.

The M32 is very effective against the Fleshpound, able to exterminate one with a single drum on any difficulty level. However, this can expend a great deal of ammunition in later waves, making a backup weapon highly valuable. Easiest way to dispatch a Fleshpound by using M32 to is doing a stacking grenade combination then setting them off with M32 blasts, which can vary from player to player. General profound way is not wasting more than two hand grenades against one Fleshpound unless it's really urgent and you need to spare grenade shots from the chamber for an incoming second engage.

Avoid using the M32 against the Scrake; because it has a high amount of health, easy to anger, does not have a weakness against explosives and a fast runner that covers great distances once enraged. Especially avoid using handgrenades or any kind of nuke on a calm Scrake, else your reload time will be lengthy and painful at the same time; with the retaliation of Scrake. Demolition Expert only should focus fire Scrake with the help of team in case of an enrage, hand grenades should generally be saved for other specimens. The explosion will also wake the Scrake from it's stun when engaged by Berserker or Sharpshooter in most of the cases. This, combined with the smoke, can hinder other players to deal with the Scrake. When M32 used right and dealt a good heavy-flinch as the enraging hit, it can put Scrake in a comatose like slow-rage state where Scrake looks like it's enraging but running deliberately slow. Slow-rage will require practice and Scrake's full attention to pull perfectly in a moment of desperation. Otherwise it shouldn't be attempted.

Altough blunt shots do less damage and no splash, unlike explosions blunt shots can deal damage to the head of specimen. This can sometimes be more desirable since one headshot is enough to decapitate a Siren or Husk as a level 6 Demo under any circumstance. Blunt projectiles are powerful enough to decapitate a 6p HoE setup Scrake in 5 headshots and Fleshpound in 7 headshots.

A Siren's scream can occasionally neutralize grenades in midair, and a Husk's projectile splash prematurely detonates them. However, M32 projectiles are capable of piercing through Siren's scream and allow Demolition to finish a Fleshpound as long as he/she has a clear sight for him.

With a sufficiently high level of Commando, the M32 is one of the best off-perk weapons, in part because of the faster reload speed (up to 35%). While a Commando cannot output as much damage over time as a Demolitions, he can be much more effective against larger specimens, especially the Fleshpound, which assault rifles are weak against.

The MilKor M32 Multiple Grenade Launcher is used by the United States Marine Corps. Serving as indirect fire support at the small unit level, the M32 puts more rounds on the enemy faster, enabling Marines to fire and adjust with each shot delivered. Using an advanced firing system, firing the weapon produces a quiet(compared to firearms or mortars), low-pitched "whump" sound, which means the user can fire the weapon at medium-long range without giving up their position.